Kritik af filmen "The Great Global Warming Swindle"

Denklimabekymrede skrev:
NOAH gruppen har en meget grundig "tilbagevisen" af filmens påstande på linket: http://www.noah.dk/energi/klima120707.htm

Tjek det ud

...vandt tilhængere på grundlag af grundlæggende helt forkerte data

De tiltagende klimaændringer vil efterhåndenden få selv de mest hårdkogte fornægtere til...

Kosmos skrev:

...vandt tilhængere på grundlag af grundlæggende helt forkerte data

- bop, bop!

Fx. medvirker lektor Jørgen Peder Steffensen fra Niels Bohr Institutet i filmen (sidste halvdel af klippet).
Jeg kunne da godt tænke mig, om én (eller flere) af d'herrer (m/k) ville være så snild(e) at uddybe, hvori Steffensens 'forkerte data' består!?

The film also maintains that manmade global warming is disproved by conflicting temperature data. Professor John Christy speaks about the discrepancy he discovered between temperatures at the Earth's surface and temperatures in the troposphere (or lower atmosphere). But the programme fails to mention that in 2005 his data were proved wrong, by three papers in Science magazine.

Christy himself admitted last year that he was mistaken. He was one of the authors of a paper which states the opposite of what he says in the film. "Previously reported discrepancies between the amount of warming near the surface and higher in the atmosphere have been used to challenge the reliability of climate models and the reality of human-induced global warming. Specifically, surface data showed substantial global-average warming, while early versions of satellite and radiosonde data showed little or no warming above the surface. This significant discrepancy no longer exists because errors in the satellite and radiosonde data have been identified and corrected."

...vandt tilhængere på grundlag af grundlæggende helt forkerte data, der allerede var tilbagevist da filmen blev vist.

The opinion that there's no warming in the troposphere at all seems alive while the opinion that the warming in the troposphere is dominated by the greenhouse effect doesn't seem to be alive.

og så henviser til en hjemmeside af Ole Hurlum...

The opinion that there's no warming in the troposphere at all seems alive while the opinion that the warming in the troposphere is dominated by the greenhouse effect doesn't seem to be alive.

Since the late 1950s, all radiosonde data sets show that the low and mid troposphere have warmed at a rate slightly faster than the rate of warming at the surface. These changes are in accord with our understanding of the effects of radiative forcing agents on the climate system and with the results from model simulations.
* For observations during the satellite era (1979 onwards), the most recent versions of all available data sets show that both the low and mid troposphere have warmed. The majority of these data sets show warming at the surface that is greater than in the troposphere. Some of these data sets, however, show the opposite - tropospheric warming that is greater than that at the surface. Thus, due to the considerable disagreements between tropospheric data sets, it is not clear whether the troposphere has warmed more than or less than the surface.
* The most recent climate model simulations give a range of results for changes in global-average temperature. Some models show more warming in the troposphere than at the surface, while a slightly smaller number of simulations show the opposite behavior. There is no fundamental inconsistency among these model results and observations at the global scale.
* Studies to detect climate change and attribute its causes using patterns of observed temperature change in space and time show clear evidence of human influences on the climate system (due to changes in greenhouse gases, aerosols, and stratospheric ozone).
* The observed patterns of change over the past 50 years cannot be explained by natural processes alone, nor by the effects of short-lived atmospheric constituents (such as aerosols
and tropospheric ozone) alone.
Tropical Temperature Results (20°S to 20°N)* Although the majority of observational data sets show more warming at the surface than in the troposphere, some observational data sets show the opposite behavior. Almost all model simulations show more warming in the troposphere than at the surface. This difference between models and observations may arise from errors that are common to all models, from errors in the observational data sets, or from a combination of these factors. The second explanation is favored, but the issue is still open.

.....grundlæggende helt forkerte data, der allerede var tilbagevist da filmen blev vist

Og derudover viser RSS-kurven ikke bare opvarmning i troposfæren, den viser endda en den hastigere opvarmning i troposfæren end på overfladen - ganske som de fleste modeller ville forudsige

Christoffer Bugge Harder skrev:
Og hvad mener du om Global Warming Swindle-filmens påstande om,

- at vulkaner udleder mere CO2 end mennesker?

- at middelalderlige engelske vingårde er et tegn på en stor middelalderlig varmeperiode?

- at isafsmeltningen på Grønland bare er årlige udsving mellem sommer og vinter?

- at de slutter sol-temperaturkurven i 1980?

- at 95% af drivhuseffekten er vanddamp?

- de påstår, at det meste af opvarmningen skete før 1940?

- har du spist svampe/drukket af natpotten eller hvad? For det første kan jeg ikke se, at Kosmos har skrevet et kvæk i denne tråd siden 28-12-2007! Dernæst vil jeg da vove dén påstand, at alle tre kurver på din grafik viser overfladetemperaturer - hvor nutids-niveauet forresten påfaldende ligner 1988-værdierne!?

hvilken salig Jubel, skønt alt er tyst,
medens Lyset lander paa Verdens Kyst

- har du spist svampe/drukket af natpotten eller hvad? For det første kan jeg ikke se, at Kosmos har skrevet et kvæk i denne tråd siden 28-12-2007!

Dernæst vil jeg da vove dén påstand, at alle tre kurver på din grafik viser overfladetemperaturer - hvor nutids-niveauet forresten påfaldende ligner 1988-værdierne!?

Hvad er din pointe da her - bortset fra den helt trivielle, at troposfæren nedadtil er afgrænset ved jordens/havets overflade??

Kosmos/Hans Henrik,

jeg har et simpelt spørgsmål: Hvorfor bringer du konsekvent oplysninger videre, som du ikke selv tror på?

The opinion that there's no warming in the troposphere at all seems alive while the opinion that the warming in the troposphere is dominated by the greenhouse effect doesn't seem to be alive.

We find that there is no longer a serious discrepancy between modelled and observed trends in tropical lapse rates.
This emerging reconciliation of models and observations has two primary explanations. First, because of changes in the treatment of buoy and satellite information, new surface temperature datasets yield slightly reduced tropical warming relative to earlier versions. Second, recently developed satellite and radiosonde datasets show larger warming of the tropical lower troposphere. In the case of a new satellite dataset from Remote Sensing Systems (RSS), enhanced warming is due to an improved procedure of adjusting for inter-satellite biases. When the RSS-derived tropospheric temperature trend is compared with four different observed estimates of surface temperature change, the surface warming is invariably amplified in the tropical troposphere, consistent with model results. Even if we use data from a second satellite dataset with smaller tropospheric warming than in RSS, observed tropical lapse rate trends are not significantly different from those in all other model simulations. Our results contradict a recent claim that all simulated temperature trends in the tropical troposphere and in tropical lapse rates are inconsistent with observations. This claim was based on use of older radiosonde and satellite datasets, and on two methodological errors: the neglect of observational trend uncertainties introduced by interannual climate variability,and application of an inappropriate statistical 'consistency test'

hvilken signet tystnad!

Liden sol i disse uger.
Februar har gjort os mindre.
Sne som tynger. Is som knuger.
Vi kan ingenting forhindre.

Men måske april vil hente
vore hjertebål tilbage.
Sammen vil vi tålsomt vente,
liden sol i disse dage.

(Frank Jæger)

Data - også John Christys - viser helt entydigt, at der er klar opvarmning i troposfæren

For these reasons we conclude that the diagnosis of an upper tropospheric warming in the tropics using the thermal wind is not likely to be accurate.

Desværre må vi vente et par måneder for at høre CBHs kontra